[Israel.pm] C#3 bits

Mike Freedman michael.freedman at gmail.com
Thu Nov 13 07:54:44 PST 2008


I'm still a c# t - nic haven't quite caught up yet although I love
playing around with WPF. Is there a c# mailing list for israel /
jerusalem?

Mike

On 11/13/08, Shlomi Fish <shlomif at iglu.org.il> wrote:
> Hi Shmuel!
>
> On Thursday 13 November 2008, Shmuel Fomberg wrote:
>> Hi All.
>>
>> I've been looking on C#3, and they have lambda expressions now! meaning,
>> when you write:
>> c => c + 1
>> you actually define an anonymous function that takes one parameter (c)
>> and return c+1. The type of "c" is decided by the context of the lambda
>> expression definition.
>> The aren't closures. Man, Perl made me greedy... :-)
>
> Can you also define more than one expression in the right side of this
> lambda?
> Or is it like Python, where you are limited to one expression?
>
>>
>> They also have anonymous classes. writing:
>> var p1 = new { Name = "Shovel", Price = 495.0 };
>> Will create an anonymous class. I still don't know what it's good for,
>> because as much as I seen, the fields of this class can not be accessed
>> without reflection.
>>
>> It is possible to declare a variable as "var", like this:
>> var x = new Customer();
>> And x will automatically be of type Customer. cute.
>>
>> And one last, there are Extension functions. if declared:
>> public static class E
>> {
>>     public static void F(this object obj, int i) { }
>>     public static void F(this object obj, string s) { }
>> }
>> then every instance of any type, it is possible to class:
>> a.F(5);
>> and "a" will attached to "obj", i=5.
>
> I don't understand that feature from your description. I think I understood
> the two or three previous ones.
>
> Regards,
>
> 	Shlomi Fish
>
> -----------------------------------------------------------------
> Shlomi Fish       http://www.shlomifish.org/
> The Case for File Swapping - http://xrl.us/bjn7i
>
> Shlomi, so what are you working on? Working on a new wiki about unit testing
> fortunes in freecell? -- Ran Eilam
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